const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV)
const IS_PREVIEW = process.env.VUE_APP_PREVIEW === 'true'

const plugins = []
if (IS_PROD && !IS_PREVIEW) {
  // 去除日志的插件，
  plugins.push('transform-remove-console')
}

// lazy load ant-design-vue
// if your use import on Demand, Use this code
plugins.push([
  'import', 
  {
    'libraryName': 'ant-design-vue',
    'libraryDirectory': 'es',
    'style': true // `style: true` 会加载 less 文件
  }
])

// plugins.push([
//   "import", 
//   {
//     "libraryName": "view-design",
//     "libraryDirectory": "src/components"
//   }
// ])

// plugins.push([
//   "component",
//   {
//     "libraryName": "element-ui",
//     "styleLibraryName": "theme-chalk"
//   }
// ])

module.exports = {
  presets: [
    '@vue/cli-plugin-babel/preset',
    [
      '@babel/preset-env',
      {
        'useBuiltIns': 'entry',
        'corejs': 3
      }
    ]
  ],
  plugins
}
